Axial flow magnetic drive pumps



l, v zozuLlN 2,827,856

AXIAL FLow MAGNETIC' DRIVE PUMPS Filed July 19, 1954 March 285, 1958 u? MM l ATTORNEY United StatesPatent f 2,827,856 p `AXIAL snow MAGNErIc DRIVE PUMPS Igor V. Zozulin, Vancouver, British Columbia, Canada,

assignor, by mesne assignments, to Tormag Transmissions Limited, Vancouver, British Columbia, Canada Application July 19, 1954, Serial No. 444,256

7 Claims. (Cl. 1 03-91)v My invention relates to improvements in axial tlow magnetic drive pumps.

The primary object of the invention is to provide a portable belt driven -pump having a hollow pump rotor capable of being connected between adjacent ends of an aligned pipe or flexible hose wherein the rotor is driven by a magnetic rotor itted with a driving pulley.

The invention is adapted to run in either direction at any` desired speed and to have a single rotating part in contact wth the liquid pumped.

Other objects ofthe invention are to provide a structure which vcan be opened up and the rotor withdrawn for cleansing by the removal of one end plate and to substitute one rotor part for another when the viscosity of the liquid to be pumped diiers substantially from the liquid last acted upon.

Referring to the accompanying drawings:

Figure 1 is a longitudinal sectional view of the invention, part in elevation.

Figure 2 is an end elevational view, on a reduced scale.

Figure 3 is an end elevation of the impeller.

In the drawings like characters of reference indicate corresponding parts in each figure.

The numeral 1 indicates a base plate having end standards 2 and 3, which non-rotatably support a pump body 5. The pump body is provided with a thin cylindrical Wall 7 which is fitted at one end with a member 8 having an integral tubular extension 10 forming an inlet outlet pasy sage 11. The extension is mounted in the horizontally divided standard 2 and is externally threaded at its free end 12. An annular recess is formed in the inner face of the member 8. At its opposite end the cylindrical wall 7 is provided with a sleeve 16 having a vertical llange 17 and said llange has an annular groove 19 in which a sealing ring 20 is seated. The rim 23 of the flange 17 is rebated as at 24 and is carried in a circular opening 25 formed in the standard 3 and is held against rotation therein by any suitable means, not shown.

Secured to the sleeve member 16 by circumferentially spaced studs 28 is an end p1ate'30 having an inner boss 31, and a tubular extension 32 which is externally threaded as at 33. The extension forms an inlet outlet passage 34. An annular recess 35 is formed in the boss 31 and fitted into said recess and into the recess 15 in the member 8 are bearings 36 having sealing rings 37 at their outer ends, which bearings journal a driven rotor 38. The driven rotor is an open ended substantially cylindrical structure divided intermediate its length into two halves 39 and 40 and having a bore 41 provided with an enlarged central portion 42 and litted to the outer periphery of said rotor are spaced annular bands 43. The bands are of a metal of high electrical conductivity and the rotor is of a metal of high magnetic permeability to form a bimetallic rotor for the pump. An annular recess 44 is formed intermediate the rotor.

Within the recess 44 of the driven rotor an impeller 46 is mounted, which is provided with an annular ring 47 supporting helical blades 48, which blades support a 2,827,856 Patented Mar. 25 1958 streamlined hub 49, which with the central portion 42, delines an annulus 50 which is equal in cross sectional area to the bore of the passages 11 and 34. The halves 39 and 40 of the rotor 38are connected together with a pair of bolts 51 which extend longitudinally therethrough. The ring 47 is provided with a pair of longitudinal grooves S2 which, when said ring is assembled in the rotor, receive a side portion of each of the bolts 51 to holdthe impeller 46 non-rotatable within the rotor. The tubular extension 10 and the sleeve 16 are each tted with a bearing 54 and journalled on said bearings is a drive rotor 55. The drive rotor has a cylindrical wall 56 which is reduced in diameter at one end as at 57, where it is titted with a V-belt pulley 58. Secured to the inner periphery ofthe wall 56 are spaced rows of magnets 59 having their pole pieces disposed in close proximity to the bands 43 of the rotor 38.

When the device is coupled upto a uid line and the rotor 55 is driven from a belt connected to the pulley 58 and to a suitable drive source, the magnets 59 will exert a torque upon the driven' rotor 38 and causeA it and its impeller 46 to draw uid through the pump body. Since the bore 41 of the driven rotor is of the same cross sectional area as the inlet outlet passages 11 and 34, the iluid `ow will be a substantially the same speed at any part of the length of the rotor, so that efficient pumping y action is obtained. The impeller may obviously be driven in either vdirection to reverse to iuid flow through the line. It will be noticed that the pump body is completely sealed, so that contamination of the uid cannot take place, and since the space between the outer surface of the rotor and the cylindrical Wall 7 is likewise sealed, no entry of uid or solid particles to said space can occur.

When it is desired to dismantle the pump for cleaning purposes it suffices to remove the end plate 30, which will permit the withdrawal of the driven rotor to expose the interior of the pump body for washing and inspection.

What I claim is:

l. A magnetically driven axial flow pump comprising a cylindrical pump body having a peripheral wall and an axial inlet outlet passage at each end, a pair of bearings mounted within the pump body, a tubular driven rotoi in communication with the axial inlet outlet passage at each end, said rotor having a peripheral Wall of magnetic material, said rotor being axially journalled in said bearings between the walls of the axial inlet outlet passages and having an internal diameter substantially equal to the diameter of the axial inlet outlet passages, a pair of bearings outside of the pump body, a drive rotor journalled in the second named bearings exceeding in external diameter the outer wall diameter of the inlet outlet passages, said drive rotor having an annular row of magnets, said magnets having pole pieces disposed in proximity to the wall of the pump body and in opposition to the peripheral wall of the driven rotor and an impeller tixed within the tubular driven rotor for moving fluid through said rotor between the ends of the cylindrical pump body.

2. A magnetically driven axial flow pump as claimed in claim l, said body having a cylindrical enlargement intermediate its length, said peripheral wall of magnetic material being located within the length of the enlargement.

3. A magnetically drivenaxial ow pump comprising a cylindrical pump body having an axial inlet outlet passage at each end of substantially similar diameter to the end portions of the pump body, said body having a cylindrical enlargement intermediate its length, a driven rotor having internally projecting impellers journalled within carried by the drive rotor, said magnets being disposed in opposition to the peripheral wall of the enlargement and a hub supported by the impellers within the enlargement, the annulus defined between. the hub kandA theginner periphery of thev enlargement having a. crosssectional. area substantially equal to that of one of the. inlet outlet passages. A f

` 4. A. magnetically driveni axial flow pump comprising aV cylindrical pump body, said body havingan axial inlet outlet passage at each end, aydriven rotor havinga peripheral wall of magnetic material, said rotor having. a bore therethrough axially forming, a passageway jour.- nalled between the walls of said inlet outlet passages, the cross sectional area., of inlet outletv passages. and' the passageway being jsubstantially the same at Vall parts of their length, said rotor having an impeller in its bore,j a drive rotor journalled around'V the pump body' andthe wall of magnetic material, said drive` rotor having magnets set in opposition to the wall of magnetic material'toim.-

part rotation to the driven rotoras the drive rotor. isrro-V 5. A magnetically driven axial ow pump ,asi claimed in claim 4, wherein the inlet outlet passages andthe adjoining ends of the bore ofthe driven rotor are. of the same diameter, andv means are provided betweenfthe walls of the said. adjoining passageway and the walls of' the passagesV for preventing admission of, extraneousmatter between said rotors. Y

6. A magnetically driven axial flow pump, comprising a cylindrical pump body having a peripheral wall and l 4 .g an axial inlet outlet passage at each end, a pair'of bearings mounted within the pump body, a tubular driven rotor in communication with the axial inlet outlet passage at each end, said rotor having a peripheral wall of magnetic material, said rotor being axially journalled in said 'bearings between the walls of the inlet outlet passages of the pump body, a ldrive rotor, bearings for journalling the drive rotor carried by the Ypump body,rsaid drive rotor being in part of greater diameter than the outer peripheryY of the inlet outlet passagesV of the body, said drive rotor having an annular row of, magnets, said magnets having pole pieces disposed in proximity to the wall of the pump body andA in opposition to the peripheral wall: of the driven rotor, and an mpeller xed within the tubular driven rotor for moving uid through-said rotor between the ends of the cylindrical pump body.

7. A magnetically driven axial flow pump as claimed in claim 6, whereinl the pump body ,is-K provided with. a

cylindrical enlargement intermediate its length and the.

peripheral wall4 of magnetic material is. located within the lengthVv o f the enlargement. Y

References Cited in the leof this patent UNITED STATES PA'l` l':`,I\lTSY 1,233,569 Graemiger July V17, 191,7 1,711,045 Davis Apr. 30, Y1929 FOREIGN PATENTS 192,618. Great Britain, ---g Feb. 8, 1923 

